Floating toolholder



T. R. JONES 2,416,586 FLOATING TOOL HbLDER Feb. 25, 1947.

Filed May 13. 1944 INVENTOR.

Patented Feb. 25, 1947 UNITE-.o STATES PATENT/OFFICE Thomas lt.- Jones, Chioeeo, Illu assigner or onength t@ Jenner. smith, oak perk, m.

Application May 13, 1944,` Serial 535,519

2.0 Qloirld l The present invention ,related generally 'to n heating tool holder, lout more pertioplerly to e novel, improved and simplified construction of holder which is adopted to support, e tool yodell as a rentner, a drill, a tap or other inillltl tool on the live or deed spindle of e letlie. drill Prede, multiple spindles o f a turret lathe or other simif lar machines so that the tool supported therein may have an angular or bodily iloating aetion with respect to the tool holder under all operate ing conditions.

In all tool holders heretofore constructed various means have been employed to perrnit the tool carried by the tool holder toyangularly and bodily displace itself with respectv to the tool held,- er. in aligning .itself with the worlr during the entrance of the tool into the Work, but none of these tool holders heretofore constructed have been capable of properly functioning so as to permit the free movement ofthe tool With respect to the holder dorme its withdrawn non the Work with the result that When such tool holder is used in connection with a tap, for. exemple,

for threading a hole in the Work,y the tljlr-eaylsv thus formed become mutilated on the withdrawal of the tool,v since .the conventional; tool holder Vdoes not function to permit the tool to properly Vposition itself on the withdrawal operation. `.lll/:lille this dsfldvantage of the CDllVGlltlQllrll i901 holder isprinoipelly found in Connection with the use oftools such as, a, tap` for threading a hole, it alsov occurs in onnectlQn with the Withdrawal of the reamer and drill and in. porno inptanoes, very often requires a ,speoiel grinding of ree.A ers and drills to partly overcome this difficulty. Such special grinding ruins the tools foraccurate Work. It is therefore the primary object of theV present invention to not only overcome these difficulties, but to also provide a novel, improved end e plined tool holder which Willperinit. the tree, iloetine ahenlerly or bodily of the tool on 'the vvltlldrawal operation of the tool ,fromv the WQIII;`-` as` Well as the entering of the tool into the work. t further obieot or the invention is to provide 9e. llQVel, mlPrQVed. 'sind Simplllzed @Orlsflufflllf ,a floating tool holder for support/ing a tool on the liye or dead spindle of a Ymachine whereby the tool may float'angular'ly or bodily. with respect to the holder when the tool is being forced into the Work or being withdrawn fron; the work. The latter action is especially essential in` withdrawing atool such as a tap from the Work preventing theA mutilation of the three'nled 'hole during this operatiqnof theV machines.

l e istnifprther oioieot or the invention n to: oro- (Clgifle-16) l Z lvide e. novel, improved end .Simplled oonstrpotion of el vfloating` tool holder whereby the tool ie'free under `all operating conditions to anenlarly or bodily displace itself with respect to the holds er,l i. e.; during 'its entrance into tlieworlr or its withdrawal from the Work.

Another oplet-tt of the invention is to provide e novel rend 'simplified oonetrnotlonfof e oontinnously operable tool holder' for supporting a variety of toole' thereon endhevine en adjustment Where loy the annuler or bodily dleplooement of the tool with respect to the holder may be regulated or oontrolled- The present invention en improvement on the Construction disclosed in rny Potent No. 2,399,- t Stille ned Mey l. 1946.

lhey apoye and other obieetS are accomplished py providing e oonetrd'otiorl and en arrangement ,or the vertono parte in the manner hereinafter deeoriped end. pertloiilerly, pointed ont in the eppepded eleirnrnerelrrine to the drawings .Fiel is o top plan view of rny improved tool holder: d

l le, 2 is vertioel orioss Seetlonel'view teken the, l-iln Fie-l: x e

'da 3 is. e lonnit dinel order. deotionel view taken on the line 3.-3; end

Fiel le e. ireernentery ,Crois Seotionnl view teken on'thelinelflinria?" i ln illustrating one foi-rn of roy invention I have Shown the engineer eornprieine. enrein drive inemloeror Shrink, l0 vvhioh,Y is adapted to te `seeiired to the ohiiels the live or deed Spindle of en a eutoniatioporevv machine, turret inthe orf the like nieohinee, This drive rnernloer has o. loneltndinel loore. ll in the oenter thereof-f Formed on one eide of. the drive nleinber l0 is a radially projecting` flange I2. -li'ormed integrallyfwith the redialilnnee portion l2 ie en annnlferfor oon- 'oentriioally arranged Sleeve portion li, forming in eiieet a oireiiler or dise-.lire recess Non one end or the' drive nieinloer |0- 'lhe outer periphery or. the annuler sleeve Sie provided with threads de et ldlor the purpose' hereinafter set .fortlilioooted in. the, opposite. wallsv and in dif ripe le roolielolelnpon the pins 9` wh h are adapted toreceiye I1 as a fulcrum and can reciprocate in a recti- Y linear direction on and Vparallel to the axes of these pins.` The intermediate member or ring I8 is of a relatively smaller diameter than the annular recess I4 so that in addition to the ring being capable of fulcruming on the pins I7, Can also reciprocate bodily in a rectilinear direction parallel to the axes of the pins -I'I. In this connection it will also beV noted that thev ring I8 is spaced from the face or bottom of the annular recess I4 as shown at 20 so as to permit the ring to rock on the pins I'I as a fulcrurn.v f ,Iiocated at right angles to the opposite apertures I9 in the ring orlintermediate member I8 are diametral and oppositely aligned ,apertures 2I which are fixed or driven thereinaligned pins or fulcrums 22. The axes of all these pins I'I and 22 are located in Ythe same transverse plane. vThe pins 22 extend inwardly from the ring or intermediate member I8 and form a pivot or yfulcrum for the driven member or sleeve'generallyjindicated by the reference character 23. The driven member has a longitudinal bore therein as shown at 24..for receiving andholding therein a tool such as Va tap, a reamer or a drill or similar'instrument. The sleeve 23 is Vprovided with a threaded aperture 25 which is adapted to receive a threaded set screw for securing the tool in place on the sleeve. The inner end 'of this sleeve or driven member 23 has a reduced barrel portion as shown at 26 Whose outer diameter is relatively smaller than the inner diameter of the ring 'or Y intermediate member I8. This barrel portion 26 ofthe driven member 23 has aligned diametral apertures 21 in which the opposite fulcrums or pins 22 are seated for 'permitting the sleeve` or driven member to fulcrum or rock or reciprocate on these pins. To state it in other Words, the sleeve or driven member-23 may slide over the inner ends of the pins 22 in aY direction parallel to the axes of these pins andwithin the limits between the diameter of the barrel portion. 26 and the inner diameter of the ring I8Aand vat the Sametime, Athe driven member may rock or fulcrum about these pins 22 as it pivots'within' the limit of the spacing between -these movable parts. The sliding movement of the ring I8 and driven member 23 on the respective fulcrum pins I'I and spect to the shank or drive member I0, the iioating action of the driven member 23 may be regulated to a degree consistent with the job to be performed by the tool and when properly adjusted, may be locked in its adjusted position by a locking ring 33 which is mounted in threaded engagement with the external threaded portion I of the shank ordrive member I0.

' Yl'rorn the above description it Will be readily seen that'when the shank or drive member vIll- -is mounted on ythe live or dead spindle of the VWhen the foremost end of the tool is brought 22 permits. the bodily displacement 0f the driven member 23 Withresp'ect to the drive member I0.

The rocking. movement of themembers I 8 andV j shown at 23. Y

' Embracing ltheoperative parts or members and vprm/iding means for adjusting or varying the flating movements both angularly and bodily of the, driven member'or sleeve 23 with` respect to -vtheshank or drive member I0 is a cap or encasing member "30. The encasing member has an internally threaded portion as shown atg3I on Vthe periphery of the flange ofthe drive member I0. The other portion ofthe cap or encasing member 30 has a conicallyrshaped portion Y '.32 which is complementary to and coincideswith the conically shaped Vportion 280i the sleeve or which is adapted to engage in threaded engage- Y Y Vment therewith the threaded portion I5 formed driven member 23. It wiilbe obvious that by vad justing th'e 'cap' or ve'n'casng member 3,0 with ref" into contact with the Work, the tool may angu-Y larly or bodily displace itself or may employ aV combination of the two movements with respect to the shank or holder I0 in properly aligning the tool 'with the work. This is accomplished by the right angularly positioned pins Whose axes are locatedV in substantially the same transverse plane. which the respective members I8 and 23 may fulcrum or rock on the respective aligned pins II and 22 and at the same time these same members may vshift radially on their respective pins so as to permit body displacement of the tool and driven member 23 in any direction with respect to the shank or drive member I0. In this connection it is also pointed out that the tool holder functions with equal efficiency in permitting free angular or bodily displacement of the tool With respect to the work on the withdrawal of the tool from the Work as well as in the operation of the tool When it is entering the Work, since this particularvconstruction functions with the same efficiency and 'ease of operation Whether the thrust on the tool holder is on lthe forward or Withdrawal operation. Tov state it in other words, the pins I'I and 22 Vperform three operational functions, i. e., Vforming the driving connection between'the drive member I 0 andthe ydriven members 23 may angularly displace itself in any direction with Vrespect to the drive member I0. The pins also perform the -function of permitting Ythe driven member 23 to bodily displace itself in any direction With respect to the drive member I0 Iby permitting Vthe respective members I8 and 23 to slide over the respective inner ends of these pins. This arrangement and construction of tool-holder permits the free lioat- 'ing of the toolheld therein regardless of Whether there is an invvardor outward thrust on the tool. vShould the operator desire vto reduce the angular or bodily displacement of the Adriven *member 23 with respect to the drive member l0, the encasingcap 30 may be ladjusted on `the threaded portion von theV drive member to reduce or'varyV the limits rof displacemenigsuch adjustment can then be secured by the lockfnut or ring 33.V

VFrom the above description it Will be readily Yseen that I have not only provided ajnovel, imi proved and compact as Well as'simplied con-V structionnof tool holder, but have also provided one which yWillfvvork with as equal efciency `and facility 'of V( )p'eration vonthe Withdrawal of the tool as it does on the entering 'of the tool in performing itsl Work This not Vonly eliminates the Vunsatisfactory practiceV of Vspecially Vgrinding''tools for performing their normal function, 'but eliminates scarred4 Work as Well as themutilationof j threaded or plain holes, which is often. caused by These pins in eiect form a fulcrum on Y cure by Letters Patent is:

sy the failure of the tool holder vto function on the withdrawal of the tap or other tool from the Work.

The present improved tool holder by being capable oi functioning on the withdrawal as well as the entering of the tool into the work, not only eliminates special grinding of the tool such as tapering a reamer or drill,.but also prevents breakage of tools and prolongs the life of the tool since the full length of the tool can be used when special tapering is eliminated.

While in the above specicationhave described one embodiment which my invention may assume in practice, it will of course be understood that the same is capable of modication and that modification may be made without departing from the spirit and scope of the invention as expressed in the following claims.

`What I claim as my invention and desire to se- 1. A tool holder comprising a driven member, and means including diametrally supported pins for connectingl said drive and driven member together whereby said driven member may freely displace itself bodily andangularly with respect to said drive member onan inward or outward thrust on said driven member. i

2. A tool holder comprising a drive member, a driven member, radially projecting pins carried by said drive member, an intermediate member slidably and pivotally mounted on said pins, radially projecting pins carried by said intermedrive member, a

diate member and slidably and pivotally relatedl to said driven member, whereby said driven member may freely displace itself with respect to said drive member on an inward and outward thrust on one of said members. 1

3. A tool holder comprising a drive member, a driven member, an intermediate member positioned between said drive and driven members, and fulcrum members positioned between said intermediate member and the respective drive and driven members, the axes of said fulcrum members intersecting one another and intersecting the longitudinal axis of said drive member, said driven and intermediate members being pivotally mounted and movable on the respective fulcrums" in substantially a radial direction with respect to said drive member whereby said driven member may bodily and angularly displace itself with respect to said drive member on an inward or outward thrust on said driven member.

4. A tool holder comprising a drive member, a

driven member, an intermediate member positioned between said drive and driven members,

.means for connecting said ring Vto saiddriven member for permitting diametral displacement of said driven member with Vrespect to said ring, means for connecting said ring to said drive member for permitting'diametral displacement of said 'ring with respect to said drive member in a direction at right'angles to said rst named displacement, said iirst and second named means forming the pivotal connections between said ring and said driven and drive members respectively.

5. A tool holder comprising a drive member, a driven member, an intermediatemember positioned between said drive and driven members, and two 'diametrally positioned-pins whose axes are located in substantially the same transverse plane and positioned between said intermediate member and the respective drive and driven members said driven and intermediate members being pivotally mounted and movable on the respective pins, 1.1.1, radial directions with respect@ said drive member whereby said driven member may bodily and angularly displace itself with respect to said drive member on an inward or outward thrust on said driven member.

6. A tool holder comprising a drive membena driven member, means vfor supporting a tool on said driven'member, and means including right angularly varranged sets of diametrally supported pins fo-r forming pivoted and driving connection between said members, said driven member being slidably movable on the longitudinal axes of all of said pins for permitting bodily displacement of said driven member with respect to said drive member.

'l'. A tool holder comprising a drive member, a driven member, diametral pins carried by said drive member, an intermediate vmember reciprocally and pivotally mounted on said pins, and

diametral pins located at right angles vwith respect to said first named pins and carried by said intermediate member, said driven member being reciprocally and pivotally mounted on said second named pins whereby said driven member may angularly 'and bodily displace itself with respect to said drive member.

8. A tool holder comprising a drive member, a driven member, and means including right angularly arranged 'pins whose axes are located in a substantially common transverse plane between said members for forming the driving connection therebetween andv permitting angular and bodily displacement of said driven member with respect to said drive member.

9. A tool holder comprising a drive member, a driven member, a set of radially and inwardly projecting pins secured to said drive member, an intermediate member mounted on and movable longitudinally of the axes of said pins, a second set of radially and inwardly projecting pins secured to said last named member and arranged at right angles with respect to said first named pins, said driven member being supported on and longitudinally movable of the axes of rsaid second named pins, whereby said driven member may angularly and bodily displace itself with respect `to said drive member.

l0.`A tool holder comp-rising a longitudinally extending drive member having a circular recess in,l one end thereof, a ring mounted in said recess and movable in aldirection of the diameter' thereof, oppositely disposed radialpins carried by said drive member for supporting said ring and permitting diametral and pivotal displacement of said ring on said pins, a driven member having one end thereof extending into the opening'in said ring and movable in a direction ofr the diameter of said ring, and oppositely disposedradial pins carried by said ring for supporting said driven member and permitting diametral and pivoted displacement of said driven member With respect to said ring, whereby said driven member may angularly and bodily displace itself with respect to said drive member.

11. A tool holder comprising a drive member,

a driven member, means positioned between said members including a ring member, and means located in substantially the same plane and exing pivoted on said last named means and eccentricallyAv displaceable' with 'respectto said drive teacher idr Permitting angular' arri bllv die* 'of said pins being located in 7 placement of said driven member'with respect to said drive member.

12. A tool holder comprising a drive member, Aadriven member, means for operatively connect-` ing said members together including a transversely movable and pivotally mounted ring, a pair of aligned fulcrum pins extending radially respect to said ring member and -connected to Y saiddriven memb'erwhereby said driven member with respect to said ring and connectedV to said Y drive member, and a second pair of aligned fulcrum pins extending radially with respect to said ring and connected to said driven member said rst named pair of pins arranged at right angles with respect to said second named pairV whereby said driven member may angularly and bodily. displace itself with respect to said driven member. Y

13. A Vtool holder Vccmprising a' substantially cylindrical and longitudinally extending drive member, a substantially cylindrical and longitudinally extending driven member movable bodily in a direction transversely with respect to said drive member and movable angularly in a universal direction with respect to said drive member,v a ring between said drive and driven member, and four right angularlyV spaced apart radially extending pins carried by said ring and connected to said drive and driven member for fioatingly connecting said drive and driven members togethen 14. A tool holder comprising a drive member, a driven member, means for operatively connecting said members together including a ring, a pair of aligned fulcrum pins rigidly secured to and extending radially with respect to said ring, said'driven member being mounted on said pins for transverse and pivotal movement thereon, a second pair of aligned fulcrum pins rigidly securedto and extending radially with respect to said drive member, said ring being mounted on said last named pair of pins for transverse and pivotal movement thereon, whereby said driven member may bodily and angularly dispose itself with respect to said drive member, the axes of all v substantially the same transverseplane.

15.V A tool holder comprising a drive member, a driven member, means forming a transverse and angularly movable connection between said members including a ring member, a pairof aligned Y fulcrum pins secured to and extending radially with respect to said ring member, and a second Ypair of aligned fulcrum members extending radially with respect to said ring member and secured to said driven member whereby said drivenVv member' may angularly and bodi-ly displace itself with respect to said driven member on an inward or outward thrust on said'tool holder. Y

16. VAtool holdercomprising a drive member,

a driven member, means for operatively conne'ct- Y ing said members together including a ring member, .a pair of aligned fulcrum pins extending radially with respect to said ring member, a second pair of aligned fulcrum members extending radially with respect tov said ring member and con'- nected to said driven member whereby said driven member may angularly and bodily displace itself with respect to said driven member on an inward or outward thrust on said tool'holder, and adjustable means mounted on said drive members and engageable with said driven member for varying the limits of movement of said -driven member with respect to said drive member. Y Y

17.,AA tool holder comprising'a drivemember,

fazdriven membeigmeans'for operatively connect- Y ing said members together including a ring memmembers including a ring member, means extending radially with respect to said ring meme ber and connected respectively to said drive and driven members for forming the driving connection therebetween and for permitting angular and bodily displacement of said driven member with respect to said drive member, and an adjustable i means mounted on said drive member and engageable with said driven member for varying limits of movement of said driven member with respect to said drive member.

19. A tool holder comprising a drive member, a driven member, means for operatively connecting said members together including an intermediate member, means extending radially with respect to said intermediate member and connected respectively to said drive and driven mem.. bers for forming the driving connection therebetween and for permitting angular and bodily displacement of said driven member with respect to said driveA member, and an encasing member adjustably mounted on said drive member and engageable with said driven member for Y varying the limits of movement of said driven spect to 4said drive member, oppositely aligned e pins secured to said driven member and journaled on said annular member for forming the ful.. crum for said driven member and'for permitting bodily displacement of said driven member with respect to said annular member, said driven member having a bevelled face thereon, and an adjustable encasing member mounted in threaded engagement with said drive member and having a complementary bevelled face engageable with said iirst named bevelled face for varying thelimits of movement of said driven member with respect to said drive member. l

e THoMAsaJoNEs.-

REFERENCES CITED The following references are of record in the iile `of this patent:

' UNITED STATES PATENTS Miller Y Ai.; Oct. 10, A1922 

